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1.7 Energy, work and power

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Question 125

Which method of heating a living room has the least impact on the environment?

A

Burning coal in an open fireplace.

B

Allowing direct sunlight to enter through a large window.

C

Running a portable electric heater plugged into the main power grid.

D

Operating a gas heater powered by bottled butane.

Markscheme

1.7 Energy, work and power Questions

  1. IGCSE
  2. /Physics
  3. /1.7 Energy, work and power

533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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